Q. The temporary hardness of water can be removed by

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Q. Rapid gravity filters

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Q. If n is porosity, y is specific yield and r is specific retention of any soil, the relationship which holds good, is

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Q. Alum is a

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Q. In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively,

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Q. The requirement of water per capita per day, is

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Q. Water losses in water supply, is assumed as

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Q. The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form

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Q. 'Shrouding' is essentially provided in

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Q. The ensure proper growth of children's teeth, the quantity of flouride used in water mains, is

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Q. Chemical coagulation of drinking water, is done

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Q. The U.C. (uniformity coefficient) D₆₀/D₁₀ for the best filter media sand should be

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Q. Pick up the correct statement from the following :

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Q. Specific yield of a well is

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Q. Normal values of overflow rate for plain sedimentation tanks in litres/hr/m², generally range between

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Q. The coefficient of permeability of soils, is generally expressed in

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Q. Pick up the correct statement from the following :

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Q. Total flow in stream is known

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Q. Disinfection of drinking water is done to remove

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Q. The ratio of total capacity and dead storage is kept

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